Binding



Aug. 3, 1943. A. F. BROOK BINDING Filed Nov. 7, 194:2 ['1 flan 015 f 5900K Application The invention herein disclosed relates to bindings and particularlyto those of the permanent? asdistinguished iromztheloose leaf type;:

s l P T-ENT- OFF E;

Q- zg'szasss 11.; LEN ING, p v .1 M 1??- Bm i n N? J-T l 'z', 1ej42,fsor i 1no.; 4651.908" ;;oais (0. 231521) f] Objects of the invention are to provide a 'slmple,

' inexpensive, readily manufactured and easily ap- V plied iorm,ofbinding',.whichcan be made of-nonmetallic materials, such'as plastics and'whi'chinx addition tothe 'foregoinggwill be light in'iweight' V unobtrusive in appearance and, if so desired, actu- -j ally adding an ornamental or decorative efiect'to the book structuregof which it may formrta part.

The foregoing and other desirable objects are attained by novel features of constructi'omco'm- 'bination and relation -ofpartaall as hereinafter defined and broadly claimed. The drawing accompanying and forming part of commercial embodiment of {thBiIlVntiOn and a ture and modeof :applicationchowever may be I modifiedand changed withinthe:broad' scope of the invention, as will be apparent from the following specification and claims. I v n Fig. l is a plan view of a book having 'the binding incorporated therein. .1 7

. Fig. 2 is an edge view showing the appearance of the back of the book. i 2 V 1 r .Fig. 3 is an enlarged broken cross-sectionalview as on line 3.3.oi Fig. 1. 1 i o Fig.4 is a similar view but showing the book in closed condition.

. Fig. 5 is a broken plan illustrating the first stage in applying the binding unit, by firstpassing the end of the coil at one end'of the u'nitthrough the 7 leaves or layers that are to be bound together. i

the following specification illustrates a practical I present preferred method of application. 3 Struc- V The units may bemadeof 5 These and their convolutions': advance helically'i' away from theaopposite ends ofthe barianc'l are 'sub stantiallyequal indiameterand coaxial.

Also. the. two coils may be o'futh'esame number of: turns; two" complete turns in the: illustration;

to fsubstantiallyfill the elongated rectangular rio'rm of -openingsshown.': The ends of' the. coils .may

as indicated at I6,'or they"may be*pointed or; .beveled as indicated'at I Land in somezinstances,

both the 'abru'ptand the pointed ends' naybe i-o: videdxoh thesameunitgaci I A 'plastic of; good I elasticity. has been; found most "desirable-'- This plastic.is-obtainablein lengths j of small diameter circularcross-section;which inthe thermoplastic form may becoiled; while-heat ed and thenv cooled to set the coilslandgivethe structure a permanentspringy character. an:

Fig. 6 is a similar view illustrating the second stage in which the end of the second coil is started through the adjoining perforation in thesheets and indicating the extent to which the intermediate, bar portion of the unit must be momentarily distorted to permit this dual engagement of the end coils in the leaves.

' Fig. '7 is a broken cross-sectional view as on'line- 'liof Fig. 6, illustrating the constriction of the inner convolutions necessary to .pass the bar portion across the back edge of the boundleaves.

" r Fig. 8 is a broken plan showing the binder unit fully seated with the bar serving as a lockto retain it in that relation.

Fig. 9 is a perspective view of the binder elementalone. 1

The book shown in the several views *consists of a stack of leaves In, and a one-piece cover ll, having closed,as distinguished from the open slot form of perforation'slZ.

' l9, this because of the iact-that-the endcoils'f' are passing through theperforations; inward of the back wall 20, of the stack and the inner convolutions at] H), are compressed against-andat the outside of the back wall 20. This temporary segregation-of the inner bar-attached convo1u-- tionsfrom the outer turns permits 'then abodily .The intermediatebari portion 13, connecting the ring forming; ?coils,r-prevents' these. coilsirom' being directly turned'or screwed into place and requires the unusual method of assembling illustrated in Figs.'5, 6, land 8. Asshown in Fig. 5, first the end It of one coil is passed through one set of perforations l2,. which can bejaccomplished byinserting the end while the coil is inclined to the back of the sheets.

Then the other coil is brought in toward the back as in Fig. 6, and the other end passed through the" adjoining perforations, while the second coil 15,

is inclined in the opposite relation from coil l4. With both coils thus started, the outer" or'end convolutions will be stretched to greater diameter'as at 18, Fig; '7, and the inner'convolutions, directly connected Withthe bar portion, reduced or constricted to lesser diameter as indicated at rotation of the entire unitfrom'the position in-f 'dicated in Figs. 6, '1, to the fully seated position-' V layersriofmaterial. are boundto'gether y 013.8;01' more binder units, consistingseachtof a v substantially straight length of material 13; or a f v zlengthtobridge-=the:space betweenxadjacent'peb iorations and havingzoppo'sitelyi pitched-coils I41,

' '15; at fopposite ends of the same, forming theiring Asshown particularlyiin Fig.- 9;;the tWo oons jstart away fromthe .same'sideof theibarlportion Y abruptly angled variousmaterials. Y

t p a V I 2,325,933

indicated in Fig. 8. -In reaching thisifinal posi- I tion, the bar [3, as will be clear from Figs, 6 and 7, will first turn inward and around across the "back wall 20, and will then, as the inner turns pass through the perforations, becarried up over the top of the stack extending directly across be-,

" tween adjoining perforations, where it then forms an absolute lock, preventing further rotation in that direction, or in fact, in the opposite direction, if, attempt ismade to turn the device in :the,unwindinglgdireotion. It will be observed however, that on familiar with the method of assame backwardly 'and at the same" time, -c0I npressing'the inner convolutions sufliciently to force the bar portion to rotate at tion described in connection with Fig. 7

When used with a eoveras in the case illus-' .trated,-the bar element I3, will be confined 'at 'all times between one side} of t'he stack andT'the sbackfportionofiethe cover, as shown in Figs. 3

I z Eor bookslin-the small sizesa-single binder-unit may be employedand in the larger sizes, asfmany.

a'distance apart corresponding to the spacing of the perforations in said sheets, segregating the outer end convolutions of the, coils and starting the same through spaced perforations in the stack and then, while contracting theinner, directly connected convolutions to pass across the edge of the stack, simultaneously rotating the two I sembling,,may detach the unit by rotating ti -Q,

h 9%??? .1 and'ag'ainst the wall 20, in the reverse of the a c-J coils through the perforations-until the connectin iportion between the coils reaches apositionfofatidns. r

2. The method of applying a binding consistoverlyi-pgthe between the coil occupied per- ;ing of asubstantially straight strand with oppositely pitched coaxially coiled ends to a-stack of perforated sheets and which comprises expancltherendconvolutions, of the coils enteririg said' 'ends in spaced perforations in, the stack -of sheetsy whi l'e contractingthe inner convolutions connected by the straight portion of the .strand to pass across the edge of the stack and l p subsflaht'ial'lysimultaneously rotating Both gunits 'asymayt seem desirablemay be usedj For a medium size book, such as shown in Figs liand 2,three ofithetunits maybe employed; =1 1 The; binding is'particuIarIyfIight and strong for: the amount of material employed. The sheet holding; ring for-mingcoils are the strongest parts of the device. and thebarserves as afiexible 7 connection between the .ring constitutingxelee' fitting-the perforations,-s .-hold the leaves against I f plastic .is usedgas the resilientfbinding medium; the istrand may be transparent or colored, thus to be either hardly observablaorsto actually addxa decorative note. While soft: and pliable enoughrto readily. bend, as forincreasing the diameter of, theoendz'convoi- I .lutions andl-decreasing the di-ameter oflthednterundesirable shifting.

mediate ;.convolutions;: Lthe; imateriaI Y employed 7 should have enough resiliencytospring back "and resume thenonnalgcoil diameter.

1 51; The method'. of;binding a stack of-per forate'd sheets, which Jcomprises coiling the opposite: ends. ota-straight strandor flexible, resilient, material into oppositely pitched coaxial' helical 'ccils spaced the coilsmntil the -subfiahti-allyrs'traight intermediate connecting portion of the strand brings upag'ainsttheiface'of the'sta'ck. I i

3. As a nwiarticie oft-manufacture, la binding element" ilOIlSi-Sfiill'guOf a "single Y strand of flexible resilient material, having oppositely pitched oo ;:airi'a1-'helical; coils 3ait Qpp0Sit8=I1dS of'the same, j vtth theiends of said coils terminating subs-tantially within the 3 'circul' anio utiine of said coils 7 said; coils fconsisting-i each.rof. two -or more conivolu-tions; l. 1 4.;As anewarticie of'manufacture, a binding element comprising a. substantially. straight bar of flexible resilient plastic"having-opposite end 3 iportionsjcoiled away f-rom, the jsame'side of the .barz in oppositely pitched coaxial: helicesxo'f the same diameter, eachfficoil iheing-of: substantially two 'completel-convol'utibns with. thefccnvolutions in close side by--si'de itelaticn, the ends. of "said coils beingfztee and lyin'gwithin. the circular outlin'e 'ofth'e' coils; sai-drfre vEnds.1perrnit'ting sep= aration of the outer'qsconvolutions;suflicientlyeto hep-entered: in. :adioining; perforations in 5a "stack of sheets to be bound andz--the.zplastic being-sum iciently flexible and: Epliable to permit" tlie. simultaneous threading of said oppositely-pitched coils completely, 'ithrou'gh' said?" perforations quntil stopped by the bar .portior'ii-connecting said. coil-s. -.f FJ BR'OOK. 

